The Hawk and His Boy: The Tormay Trilogy, Book 1

Jute can break into any house, climb any wall, and steal anything - and he just got hired for what he thinks is an easy burglary job. The only problem is, if he succeeds, the Thieves Guild is going to murder him. He just doesn't know that. Not yet. Being a thief always came easy for him, but it's a lot harder now, particularly when everyone wants him dead. Hiding out in the city of Hearne, Jute finds some strange allies in an old wizard and a talking hawk. Together, they uncover an ancient secret of terrifying power.